Shape transition and oblate-prolate coexistence in N=Z fpg-shell nuclei
Creators
- 1. Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503 (Japan)
- 2. Laboratory of Physics, Fukuoka Dental College, Fukuoka 814-0193 (Japan)
- 3. Institute of Natural Sciences, Senshu University, Kawasaki, Kanagawa, 214-8580 (Japan)
Description
Nuclear shape transition and oblate-prolate coexistence in N=Z nuclei are investigated within the configuration space ( 2p3/2, 1f5/2, 2p1/2, and 1g9/2). We perform shell-model calculations for 60Zn, 64Ge, and 68Se, and constrained Hartree-Fock (CHF) calculations for 60Zn, 64Ge, 68Se, and 72Kr, employing an effective pairing plus quadrupole residual interaction with monopole interactions. The shell-model calculations reproduce well the experimental energy levels of these nuclei. From the analysis of potential-energy surface in the CHF calculations, we found shape transition from prolate to oblate deformation in these N=Z nuclei and oblate-prolate coexistence at 68Se. The ground state of 68Se has an oblate shape, while the shape of 60Zn and 64Ge are prolate. It is shown that the isovector matrix elements between f5/2 and p1/2 orbits cause the oblate deformation for 68Se, and four-particle four-hole (4p-4h) excitations are important for the oblate configuration
Additional details
Identifiers
- DOI
- 10.1103/PhysRevC.70.051301;
- arXiv
- arXiv:nucl-th/0410046v1;
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 70
- Journal Issue
- 5
- Journal Page Range
- p. 051301-051301.5
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37011619
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- DEFORMED NUCLEI; EXCITATION; GERMANIUM 64; GROUND STATES; HARTREE-FOCK METHOD; ISOVECTORS; KRYPTON 72; MATRIX ELEMENTS; NUCLEAR DEFORMATION; NUCLEAR ELECTRIC MOMENTS; PARTICLE-HOLE MODEL; POTENTIAL ENERGY; QUADRUPOLES; RESIDUAL INTERACTIONS; SELENIUM 68; SHELL MODELS; ZINC 60
- Descriptors DEC
- APPROXIMATIONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CALCULATION METHODS; DEFORMATION; ELECTRIC MOMENTS; ELECTRON CAPTURE RADIOISOTOPES; ENERGY; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; GERMANIUM ISOTOPES; INTERACTIONS; INTERMEDIATE MASS NUCLEI; ISOTOPES; KRYPTON ISOTOPES; MATHEMATICAL MODELS; MINUTES LIVING RADIOISOTOPES; MULTIPOLES; NUCLEAR MODELS; NUCLEAR PROPERTIES; NUCLEI; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; SELENIUM ISOTOPES; TENSORS; VECTORS; ZINC ISOTOPES
Optional Information
- Notes
- (c) 2004 The American Physical Society